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Wednesday 22 November 2017

Sea

A sea is a large body of salt water that is surrounded in whole or in part by land.


Only 1 in 1000 animals born in the sea survives to maturity.

135 million tons of seafood is consumed worldwide every year.

The modern scientific study of the sea—oceanography—dates broadly to the British Challenger expedition of the 1870s.

On January 23, 1960, Swiss engineer Professor Jacques Piccard, and US Navy Captain Don Walsh, took the submersible Trieste to a depth of 10,916 m (35,814 ft) in the Mariana Trench in the Pacific, the sea’s deepest point.


The deepest ocean sinkhole in the world is in the South China Sea and is named the Dragon Hole, or Longdong. It is roughly 987 feet (301 meters) deep. Below 328 feet (100 meters) the hole is devoid of oxygen, and deadly to marine life.

The Sargasso Sea is a region in the middle of the North Atlantic Ocean, surrounded by ocean currents. It is the only sea that has no coast.

Icarus tried to fly using a pair of wings his father made fashioned from wax and feathers. The youth flew too close to the sun, thus melting the wax. He then fell into the sea and drowned. The Icarian Sea in the Aegean is named after him.

The sea offers a very large supply of energy carried by ocean waves, tides, salinity differences, and ocean temperature differences which can be harnessed to generate electricity.

The first tidal power station in the world, the kilometer-long Rance Tidal Power Station, opened in 1966 on the estuary of the Rance River in Brittany, France. It produces around 540 GWh per year, around 3% of Brittany's total electrical consumption.

The Rance Tidal Power Station By User:Dani 7C3 

Sea foam is a type of foam created by the agitation of seawater, particularly when it contains higher concentrations of dissolved organic matter. These compounds can act as surfactants or foaming agents. As the seawater is churned by breaking waves in the surf zone adjacent to the shore, the compounds trap air, forming bubbles which stick to each other through surface tension.

Aea level rise is caused by two main factors, melting glaciers, and "thermal expansion" the expansion of space between water molecules as the ocean gets warmer. So the ocean is both gaining water molecules, and the water molecules are spreading out and taking up more space.

The salinity of seawater is almost four times that of our urine. Therefore, to get rid of all the excess salt taken in by drinking seawater, you have to urinate more water than you drank. Eventually, you die of dehydration even as you become thirstier.

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